Index using Dewey Decimal System

Here are the top-level areas of mathematics and related fields
classified according to the Dewey Decimal system, used in many
libraries worldwide. For further information about the DDC, visit
the Dewey home page
or visit the Cyber-Dewey page for applying the DDC to Internet resources. If you need to
find resources by DDC number, try this search tool at the
Library of Congress.

At this level of generality, the DDC serves only as a coarse guide to
the subject areas of mathematics. The system used more commonly among
mathematicians is the Mathematics Subject Classification (MSC) scheme, which is the basis for the organization of materials at this site; the list of subfields according to that system is rather longer.

If any DDC aficionado wishes to send in the one hundred or so headings
51x.x it may be possible to convert them to appropriate MSC headings; based
only on very limited information it seems appropriate to suggest these links: